微波加热在矿冶方面的应用研究现状

介绍了微波加热技术目前在干燥矿物、磨矿、活性炭再生、矿物冶金等领域的国内外研究与应用现状。微波加热作为一种新兴的冶金技术越来越受到关注,随着微波加热技术的深入研究,微波技术在矿冶领域必将发挥重要的作用,具有广阔的应用前景。     

微波加热在钛冶金中的应用

在简要介绍微波加热机制的基础上,对微波加热技术用于钛冶金过程中的研究、实验结果进行了总结,结果表明:微波加热技术在钛铁矿的预处理、选矿、碳热还原、钛的液相提取等领域具有广阔的应用前景.通过分析微波加热技术应用于钛铁矿处理过程中存在问题,认为深入开展微波与矿物相互作用基础理论的研究、大功率工业微波加热设备的研制,将推动微波加热技术应用于工业化生产.     

铁矿石微波烧结试验研究

本文采用微波烧结研究了铁矿石微波升温特性、微波烧结矿碱度、矿相结构、孔隙结构、冶金性能等与传统烧结矿的差异.研究结果表明,微波烧结矿具有烧结温度低、矿物组成更合理、孔隙率高、冶金性能更好的特点,证实了采用微波加热生产烧结矿具备技术可行性,可为铁矿石微波烧结工业化提供理论支撑.     

微波加热在冶金碳热还原中的应用研究现状

介绍了微波加热的基本原理以及矿物在微波场中的升温特性，重点介绍了微波加热在冶金碳热还原中的应用现状，并分析了微波加热碳热还原技术应用于铁合金生产的前景。     

微波在钢铁冶金中的应用

微波是一种冶金新技术.本文首先简单介绍了微波的特性及产生,然后着重阐述了微波热效应和微波等离子体在钢铁冶金中的应用和展望.微波加热具有选择性、整体性和高效性,而被广泛应用于矿石的处理、金属的提取以及湿法冶金等;微波等离子体较直流和射频等离子体有更多的优点,更符合生态冶金的需要.随着微波技术和微波设备的进步,微波等离子技术和微波加热技术将在冶金领域中有更为广阔的应用前景.     

微波加热在钒钛磁铁矿冶金领域应用的研究进展

概述了钒钛磁铁矿(及含钛矿物)的微波加热特性,微波加热技术在钒钛磁铁矿冶金中的应用现状;针对攀枝花-西昌地区丰富的钒钛磁铁矿资源未实现铁、钒、钛同时有效回收的现实,结合微波加热技术“选择性加热、内加热、强化浸出”的特点和设备规模小等问题,指出微波加热在钒钛磁铁矿冶金中应用的重点研究方向为微波加热还原钒钛磁铁精矿及钛铁矿...     

中国有色金属学会推荐的全国创新争先奖候选人介绍

<正>彭金辉,男,1964年出生,教授,博士生导师。现任昆明理工大学校长。彭金辉长期在教学、科研一线从事微波冶金基础理论、装备技术及工程应用研究。在国际上率先开创微波冶金工程化研究领域,构建微波冶金理论体系。首次研发具有国际领先水平的成套化、大型化微波冶金装备与应用新技术,建成了世界上第一套兆瓦级的微波装备。微波能技术与装备在有色冶金     

微生物强化浸出及微波技术在黄铜矿冶金中的应用

为了提高黄铜矿的浸出率，可以施加许多微生物强化浸出方法。本文论述了微波技术在矿物处理和冶金过程中应用的现状及其在提升冶金效率方面的巨大潜力。指出了微生物湿法冶金的发展方向。     

微波及超声波在钨冶金中的研究进展

概述近年微波及超声波在钨冶金生产工艺中的应用研究进展,简介其应用工艺和技术.主要从微波在钨冶金中应用:促进黑、白钨矿浸出;促进含钨化合物合成;烧结含钨化合物与热分解制备三氧化钨;超声波在钨冶金中应用:强化钨矿浸出及仲钨酸铵结晶;辅助制备含钨化合物;工业探伤应用等领域进行介绍.微波及超声波技术在钨冶金中应用将越来越广泛和深入.      

微波加热技术在冶金工业中的应用

在简要介绍微波加热原理和微波加热优点的基础上,综述了微波加热技术在铁矿石预处理、碳热还原、冶金原料的升温特性、废气处理、钢渣处理等领域的研究成果和进展。认为微波加热技术在冶金工业中具有广阔的应用前景。     

矿物及化合物微波化学理论与应用研究进展述评

综述了矿物及化合物（有色金属矿物及原煤）的微波加热特性、微波化学机理及微波加热应用研究进展，评述了各类有色金属矿物微波化学理论研究的程度及应用前景。     

微波处理碳质金矿石技术研究

对碳质金矿石的预处理方法进行了评述;分析研究了碳质矿物对金浸出的影响;论述了采用微波加热技术处理碳质金矿石的可行性;介绍了针对某碳质金矿石进行的微波预处理试验研究方法和试验指标;同时探讨了微波技术工程化应用中可能存在的技术难点及研究方向。     

Enhancing mineral liberation of a Canadian rare earth ore with microwave pretreatment

Liberation, as an attribute of mineralogy characteristic, whose impacts on finely disseminated Canadian rare earth ore was studied with microwave pretreatment. Samples of a light rare earth ore along with mostly ankerite and biotite as dominant gangue minerals as well as bastnaesite, strontianite and goethite as dominated minerals were exposed to further comminution by ball mill and microwave pretreatment fragmentation. Mineralogical characteristics were analyzed by using a mineral liberation analyzer (MLA). The results indicated that tight association mutually penetrates among dominated minerals in the range size of ?300 + 212 μm and ?212 + 150 μm and gangue minerals in the form of adjacent type, fine vein type, shell type and packing type. Temperature in the ore samples pre-treated by microwave can rapidly rise to 250 °C with microwave power of 0–1.5 kW and microwave time of 0–2 min. Applying the microwave pretreatment merely reduces the hardness of the ore causing the fracture of rare earth ore, but this does not transform or change the original mineralogy characteristics of the ore samples. On the basis of above study, the liberation value of bastnaesite, strontianite and goethite with microwave pretreatment is greater than with conventional comminution when the liberation class is above 75%. The distribution of particle size of rare earth ore samples is better with microwave pretreatment than with conventional comminution for particle size of 7.4 × 10^?5 m. With microwave pretreatment, the theoretical grade–recovery of bastnaesite, strontianite and goethite in the rare earth ore attains better results than with conventional comminution at a given grade.     

Dearsenification of gold concentrates via microwave roasting

ABSTRACT

Arsenic can cause environmental pollution and also affect mineral processing efficiency. To determine the mechanism of separating arsenic from minerals, microwave roasting tests were conducted using Hunan arsenic sulfide gold concentrate as a raw material. The heating behaviour of gold concentrates under microwave irradiation was analysed. The effects of roasting temperature, reaction time, and oxygen content on arsenic removal were investigated. Temperature has the greatest effect on arsenic removal, followed by reaction time and oxygen content. The optimum parameters were determined experimentally. The removal rate of arsenic was 93.16% (gas supply: 4?L min^?1, reaction temperature: 650°C, duration: 15?min). Scanning electron microscopy analysis of the minerals after microwave roasting and conventional roasting showed that there are more cracks on the surface of minerals after microwave roasting, and the specific surface area is larger. The reaction mechanism of arsenic separation from gold concentrate during microwave roasting is discussed.     

微波处理低品位氧化铅锌矿

采用微波对低品位氧化铅锌矿进行处理。结果表明,试验矿物对微波有较好的吸收能力,微波在矿物的浸出方面有积极效果,矿物经微波活化后锌、铁的浸出率都有增加,且微波活化对铁浸出的影响更为明显。     

Preparation of Microporous Minerals Through Thermal Treatment: A Review

Microporous minerals have been widely applied in industry as catalysts, cation exchangers, adsorbents, and sequestering agents. This review highlights the preparation of microporous minerals through thermal treatment, including thermal modification and thermal synthesis. The preparation processes are described in detail, while microwave irradiation as an advanced heating method is especially stated. The mechanisms by which microporous minerals are prepared by thermal modification and synthesis are separately summarized. The important parameters of affecting the thermal modification and synthesis processes are stated. Finally, the instrumental techniques to characterize microporous minerals are presented.     

应用响应面设计分析法研究碳酸锰吸收微波的性能

以碳酸锰为微波吸收材料,考察了微波输出功率、微波辐射时间、样品堆积厚度和样品质量等因素对微波吸收率的影响。基于单因素条件影响试验结果,采用响应面法进行试验设计、方差分析、曲面分析及模型优化。结果表明,各因素影响显著程度为:微波功率>样品堆积厚度>样品质量>辐射时间,且交互影响不显著。当微波功率为675W、作用时间为131.5s、样品堆积厚度为15.4mm、样品质量为153.6g时,碳酸锰的微波吸收率模拟值最优为6.28%,与实际试验结果(5.89%)能较好吻合,误差约为6.6%。响应面分析法对矿物微波处理过程的因素影响程度有较好的预测性。     

外场强化技术在锰矿资源处理过程中的研究进展

摘要：锰矿作为一种重要的战略性资源矿产,广泛应用于钢铁、电池、农业、冶金及国防工业等领域,发挥着至关重要的战略作用。近年来,随着锰矿产业的迅速发展,中国已经成为全球第一大锰矿资源消费国,锰矿资源需求量逐年增加。基于当前锰矿仍为我国短缺矿产、需求量大,传统加工工艺在产率、可持续发展和自动化等方面出现了明显短板的实际情况,为了保障国家锰矿资源战略安全,促进我国锰矿行业的可持续发展,因此探索一种能高效、清洁、经济处理锰矿的加工方法成为国内外研究热点。研究表明,微波、超声波、流场、压力场等外场手段能高效清洁的处理矿物,并提高产品质量。因此,对微波、超声波、电场、压力场及流场等外场强化技术在锰矿处理过程中的应用研究做出了总结和思考,这对外场强化技术处理矿产资源的后续研究具有指导意义。     

Heat and Mass Transfer during Microwave Steam Treatment of Contaminated Soils

A time-dependent mechanistic model has been developed to describe the coupled heat and mass transfer during microwave steam treatment of contaminated soils. The model consists of multiphase mass and energy conservation equations, along with various temperature-dependent parameterizations of important physical state properties. The coupled nonlinear equations were solved numerically by applying a macroscopic control volume method with the appropriate boundary and initial conditions and using a finite-difference scheme. Microwave heating experiments of soil samples were performed. The effects of microwave power, soil sample depth, and soil type on water evaporation rate and temperature were measured with time. The modeled results are in good agreement with the experimental data. The results revealed that microwave power density and soil sample depth significantly affect the microwave evaporation process of water from soils. Water evaporation rate and temperature variation are complex and associated with the dielectric properties of liquid water distributed within the soil. The deeper the soil sample, the more nonuniform the evaporation process, although nonuniformities diminish as the evaporation process approaches completion. Finally it was verified that soil types and their thermal properties play a minor role, provided that the soil minerals are microwave transparent.     

硅酸盐细菌在资源工程中的应用研究现状

对硅酸盐细菌的特性及在矿物加工领域中的应用现状作了较全面的综述；重点概括了硅酸盐细菌用于分解矿物、提取有价金属、矿石除杂、浮选、水处理等矿物加工方面的最新进展；同时，对硅酸盐细菌的解矿机理及在溶矿方面应用存在的问题进行了分析。